If you are asking to simplify, this is what I got. Hope I was able to help
Answer:

Step-by-step explanation:
Assuming we want to find the equation (74,2) and (4,9)
This is an equation of a straight.
Let this equation be y=mx+b.

We substitute the slope and (4,9) to get:

We rewrite in standard form to get:

The 1905 was 3.0 inches while 2004 was 4.2 inches since they are 1.2 apart and they add up to 7.2
Answer:
0.36 cents
Step-by-step explanation:
1.80/5=0.36 <----answer
To check you can do 0.36x5 and get 1.80